The 600 series cards are here and near-full swing. We have arlready seen GTX 680 and GTX 690 (dual chip flavored). EVGA and other similar less stellar companies have launched the more modestly priced GTX 670'and boy does this puppy perform! Check the reviews below. But it seem the 670 can match a 680â?²s stock performance with a bit of overclocking in Precision X. Legit Reviews actually got this sucker up +130MHz on the core clock!!